ANSWER: If he drinks intoxicants, you must not pray behind him as he is an open sinner. The prayer is valid as long as he is sober but one must not knowingly or willingly allow him to lead.

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ANSWER: If she prays it within the prescribed time, she is not sinful but she is playing with fire as there will coma a time when she would miss the prayer for one reason or the other and then she is sinful big time.

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